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(FILES) This file photo taken on June 4, 2016 shows Serbia's Novak Djokovic training with his coach Boris Becker at the Roland Garros 2016 French Tennis Open in Paris.
World number two Novak Djokovic confirmed on December 6, 2016 he has split from his coach Boris Becker after three years working together. "Boris Becker and I have jointly decided to end our cooperation," Djokovic, who won this year's Australian and French Open titles, wrote on his official Facebook page. / AFP PHOTO / MIGUEL MEDINAMIGUEL MEDINA/AFP/Getty Images